Top Angular 2 Interview Questions and Answers - Essential Guide for Job Seekers

Last updated on Feb 07, 2024
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Angular 2 Interview Questions

To survive in the modern industry and to earn a very good salary, learning only JavaScript programming language is not sufficient, you must move on to learning JavaScript Frameworks also i.e., Angular. It doesn’t matter if you are thinking to start your career in software development or are already a software developer, you will always find Angular 2 Interview Questions useful. This is an open-source component-based UI framework that is written in TypeScript and is mainly used in building web, mobile, and desktop applications in HTML and JavaScript. Angular is an evolved and upgraded version of Angular JS and is invented by Google. For writing codes, Angular provides many language choices like Typescript, Dart, ES5, ES6. It supports both data and property blinding which allows a user to control DOM i.e., Data Object Model by binding class and HTML properties.

Quick Facts About Angular 2
What is the latest version of Angular? Angular 14 released on 2nd June 2022
When did angular 6 release? 14th September 2016
Who is the developer of Angular 2? Google
What language does Angular use? TypeScript
License MIT License
Official website

Frequently Asked Angular 2 Interview Questions for Developers

Here in this article, we will be listing frequently asked Angular 2 Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q21. How do you check if angular CLI is installed?

To check this, you need to make sure that node is installed and then check if angular CLI is installed.

  • Open a command prompt using cmd.
  • Type node -v and npm -v to ensure node is installed.
  • Type ng -v
Q22. What is Router-link directive in Angular 2?

The router-link derivatives enable the navigation from any specific view to the other. It works immediately as a user is performing application tasks. The link can directly arise from browser and navigation is done on the basis of user action like the click of an anchor tag.

The router link directive gives control to the router for anchor tag elements. It also binds a clickable HTML to the route to enable the navigation. The routerlink directive can easily be bound to an array, E.g.

<a [routerlink] = "[ '/ heroes']" >Heroes</a>

Q23. What is the configuration required for caching of static resources like images, css and js in Angular 2?

During Development Mode, caching for static resources can be done through the Design of Tools. If you want to cache on the production stage, you need to check and update the Server-End Settings accordingly.

Note: These are basic angular 2 interview questions that are asked for a position as SDE in Angular Development.

Q24. What are filters in Angular 2?

A filter is a necessary phase of Angular 2 as well as Angular 4. It is basically used to filter an object from a crew of items, which are there in an array or an object array. It selects a subset of the objects from an array and returns it as a new array and displayed on UI. Filters can be used with an expression using pipe | sign. {{expression | filterName:parameter }} Angular 2 includes various filters to layout records of special fact types.

Q25. What is hidden property in Angular 2?

In Angular 2, hidden property or [hidden] is a special case binding used to hide property. It can be compared close to ng-show and ng-hide, but more powerful to bind any property types of elements.

<div [hidden]="!active">
  Hello, this is an active area!
Q26. What is @input and @output in Angular 2?

Both @input and @output are decorators. The decorator @Input is used to bind a property within one child component to receive value from the parent component, whereas we use the @output decorator to bind the property of a component to send data from child component to parent component or calling component.

Q27. How to display the error message from backend in angular2?

To display error message in Angular 2 from backend, we have to set the error message equal to an angular variable, and then check whether that variable exists to conform whether to display it or not.

<div *ngIf="errors" class="alert alert-danger">
    {{ errors }}


Q28. What is Flex layout in Angular 2?

Flex Layout in Angular 2 is a component engine that allows you to create Flexbox page layouts with a fixed set of directives to use in designing templates. The Flex-Layout has made styling easy and user-friendly by having a TypeScript based Library, thus eliminating the need for external stylesheets/CSS Styling. In addition to this, it can be used along with Material Design for Design components and also providing intuitive breakpoints while development to aid in designing responsive layouts.

Q29. What is SPA in Angular 2?

SPA in Angular 2 stands for Single Page Applications. This is a type of web-application which fits into literally one page. All your code (JavaScript, HTML, CSS) is called using a single page load at multiple points by adding new data parallelly from the backend. Navigation between pages performed can be done without refreshing.

Q30. What is primeng and how can it be used with angular2?

PrimeNG is a rich UI component collection dedicated to Angular. Widgets present here are completely open-source and free to use. It’s simple, lightweight yet powerful and optimized for responsive cross-browser touch.

Tips to Crack Angular 2 Interview Questions
  • Angular Interviews are not just about learning Java Concepts but one of the toughest questions is to know about software and system designs.
  • Practice is the key factor to crack any type of interview. Angular interviews are no exception too.
  • You should know about basics such as TypeScript, Services, Metadata, Components, etc.
  • If you know about the answer but you are taking too much time to explain it, then that land you nowhere. So yes, Time Yourself i.e. answer your question within a time limit.
  • Teach a concept to your friend or anyone which you have learned. By this, you will know if you learn that concept.
  • Honesty is the best policy. If you don’t know the answer just admit it without wasting the interviewer and your time.
Reviewed and verified by Umesh Singh
Umesh Singh

My name is Umesh Singh having 11+ experience in Node.JS, React JS, Angular JS, Next JS, PHP, Laravel, WordPress, MySQL, Oracle, JavaScript, HTML and CSS etc. I have worked on around 30+ projects. I lo...